Can't add a tagged port on a stacked secondary switch?

[AndrewB1]

I have two x250e switches stacked together.

I can successfully add untagged vlans to ports on the first switch without an issue. But if I try to add an untagged vlan to a port on the 2nd switch (which was added to the first) then I get the below error message:

Error: Protocol conflict when adding untagged port 2:2. Either add this port as
tagged or assign another protocol to this VLAN.

Configuration failed on backup MSM, command execution aborted!

I can't see anything in the configuration to show why it would be having this problem but I must admit I'm quite new to extreme switches so I'm probably missing something obvious

Thanks!

[AndrewB1 · Accepted solution]

okay, it was just my stupidty. The port was alreadt added to another vlan hence the error.

All fixed! 🙂